ETF Special Report

The Good Times Can't Last Forever

The traded funds have been expanding their assets at a rate of more than 30% a year for 10 years. But it's about to slow down.

Wall Street has certainly had its share of product trends. Some enter the scene with great fanfare, but eventually languish. (Witness the decline of the annuity.) Some, like collateralized debt obligations, seem like a good idea until they nearly bring about the...